A former chief executive of Financial Institutions Inc. in Warsaw, N.Y., is pressuring the company to put itself up for sale.

Peter Humphrey, who was also Financial Institutions' president from 1994 to 2012, said in a statement issued Thursday that he would like to see the $3.4 billion-asset company find a buyer. It "has a superb franchise and is a valuable organization," Humphrey said in his statement.

"As a result, I am an advocate for FISI to explore creating additional value for its shareholders through a strategic combination with a larger banking organization at an attractive price reflecting the value that FISI can bring to the combined organization," he added.

Humphrey said that he and his wife control about 3.5% of the company's stock and that would be willing to support any effort that leads to a sale that would "result in such a value-enhancing transaction for FISI shareholders."

The statement comes a month after Clover Partners, an activist investor that holds about 5.2% of Financial Institutions' stock, disclosed in a regulatory filing that it wanted the company to sell itself. Clover added that it was displeased with two recent nonbank acquisitions by Financial Institutions.

In May 2014, Financial Institutions agreed to buy the insurance brokerage Scott Danahy Naylon in Amherst, N.Y. In late 2015 it agreed to buy the investment firm Courier Capital in Buffalo, N.Y.

"We are open to dialogue with all of our shareholders and routinely consider their thoughts on business and strategy as we pursue our common goal of increasing shareholder value," Martin Birmingham, Financial Institutions' president and chief executive, said in prepared statement. "Our board of directors regularly evaluates our business in light of our current strategy and is committed to delivering value to shareholders as evidenced by our stock's strong performance in recent years."

Humphrey's family has longstanding ties to Financial Institutions, owning several predecessor banks dating to the late 1800s. His grandfather formed the holding company in 1931, and his father, a former president and CEO, served on the board for nearly 50 years. An uncle and brother were also directors.

James Wyckoff, Humphrey's cousin, is still on Financial Institutions' board. Wyckoff and his wife own about 3% of the company's stock, based on regulatory filings.

In his statement Humphrey encouraged other family members to "inform" Financial Institutions' board of their views regarding Clover's filing.

Humphrey, who left Financial Institutions' board in 2014, declined to comment when asked if he had shared his views with the company's board and management and whether the had been in talks with Clover before releasing his statement.

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